168004017123 has 4 divisors (see below), whose sum is σ = 224005356168. Its totient is φ = 112002678080.

The previous prime is 168004017121. The next prime is 168004017133. The reversal of 168004017123 is 321710400861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168004017123 - 2¹ = 168004017121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168004017121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28000669518 + ... + 28000669523.

It is an arithmetic number, because the mean of its divisors is an integer number (56001339042).

Almost surely, 2^168004017123 is an apocalyptic number.

168004017123 is a deficient number, since it is larger than the sum of its proper divisors (56001339045).

168004017123 is an equidigital number, since it uses as much as digits as its factorization.

168004017123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56001339044.

The product of its (nonzero) digits is 8064, while the sum is 33.

Adding to 168004017123 its reverse (321710400861), we get a palindrome (489714417984).

The spelling of 168004017123 in words is "one hundred sixty-eight billion, four million, seventeen thousand, one hundred twenty-three".